Answer:
An element and a compound are mixtures.A student burns 1.50 mol C3H8 according to the following reaction:
C3H8 + 5O2 3CO2 + 4H2O.
How many grams of carbon dioxide are produced?
a. 1.98 × 10² g
b. 1.32 × 10² g
c. 4.40 × 10¹ g
d. 6.61 × 10¹ g
Answer:
I think the answer is A. 1.98 x 10^2 g
N2(g) + 3 H2(g) 2 NH (g)
12 How many moles of hydrogen are consumed to produce 100 g of ammonia?
A 17.8 mol H2
B. 17.6 mol HE
C 8.80 mol H2
D3 91 mol H2
Answer:
This is a stoichometric ratio
Explanation:The equation is already balanced, so all you have to do is.
1. Count the molar mass of Ammonia N nitrogen atom has an atomic mass of 14 so add 14+ 3 hydrogens which each have a mass of 1 that gives you 17 grams per mole of ammonia on the right side, so they want to know how much hydrogen is needed to make 100 grams of ammonia, so what you have to do is divide 100/17=2.94 that is your ratio so you now know there is 2.94 times everything in the equation so at first you had 3 moles of hydrogen now you have 3*2.94 moles of hydrogen. You also have 2.94 moles of N2 gas. It's just a ratio if you plug in 200 instead you have to multiply everything by 200/17=11.76 ratio.
1st step count molar mass of product.
2nd plug number they gave you and divide it by molar mass ratio then multiply everything in equation by that ratio.
PLS HELP GIVING BRAINLESS During a Chemical reaction substances (called reactants) are combine to form of new substances (called products). Which of the following accurately describes reactants and products of a Chemical reaction?
A) The product contains a different number of atoms then the reactants but have the same properties
B) The number of atoms in properties are the same in there reactants and Products
C) The products contain the same number of atoms as the reactants but have different properties
D) The number of atoms and properties are different in the reactants and the products
Answer:
your answer is gonna most likely be b
If you have 2 solutions: one equal to 9mol/L and another with 6 mol/L,
which statement is true? *
O
9 mol/L solution is thicker than the 6 mol/L solution
о
6 mol/L solution is less concentrated than the 9 mol/L solution
9 mol/L solution is less concentrated than the 6 mol/L solution
O 9 mol/L solution is equally as concentrated as the 6 mol/L solution
Answer:
Explanation:
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Which of the following describes an exothermic reaction?
O A. AHt, reactants > AHf, products
B. AHF, reactants = AHf, products
O C. AHf, reactants = 0
O D. AHF, reactants < AHt, products
The option A describes an exothermic reaction.
i.e, ΔHt,reactant > ΔHt, product
What is exothermic reaction?The reaction in which energy is release during the formation of reaction is called exothermic reaction.
Mathematically,
ΔHf = ΔH(product) - ΔH(reactant)
For exothermic reaction, ΔHt,reactant > ΔHt, product
So,for exothermic reaction, ΔHf is negative.
Where,
ΔHf = Enthalpy of formation of reaction
ΔH(product) = enthalpy of formation of product
ΔH(reactant) = enthalpy of formation of reactant
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PHMWMHW(14 points):))));)))))
Answer:
a silly
Explanation:
4. Diffuse reflection occurs when parallel light waves strike which surface?
Answer:
rough surface
Explanation:
Diffuse reflection occurs when parallel light waves strike a rough surface
Answer:
Rippling fountain
Explanation:
a cell is placed in a salt solution that has the same concentration as the inside of the cell. What will happen to the cell ?
Answer:
it would dry up
Explanation:
6 H2(g) + P4(5) → 4 PH:(9)
17 Solid phosphorus reacts with hydrogen gas to form phosphine gas (PH) as shown above What is
the theoretical yield of PH2 that can be formed when 400 g Ha reacts with 6.20 g P.?
A. 89.8 g PHS
B. 44 9 g PH
C 27 2 g PHA
D. 681 g PHI
Which statement describes the reaction involved in cellular respiration?
O A. CO2 is removed from the atmosphere, and O2 is released into the
atmosphere.
B. Sugar is produced and stored until it is needed for energy,
O c. It is a redox reaction in which energy is released to ATP
molecules.
O D. O, is removed from the atmosphere, and CO2 is released into the
atmosphere.
Answer:
A.Photosynthesis
B.Glucose
C . fermentation
D.Aerobic respiration
Explanation:
A. glucose form as a product of photosynthesis
B.glucose is simple sugar and it must be always converted to complex sugar so that it can be stored
C.Energy converted to ATP
D.Living organisms respire using oxygen and carbon dioxide is always formed as a by product
Answer:
the awnser is c
Explanation:
what is a face atom?
Answer:
Explanation:
An atom on a face is shared by two unit cells, so only half of the atom belongs to each of these cells. An atom on an edge is shared by four unit cells, and an atom on a corner is shared by eight unit cells.
Choose the options below that are true of a solution of a solid in a liquid. (select all that apply) Select all that apply: Most solids in solution exhibit a general trend of increasing solubility with increasing temperature. A seed crystal may be added to a supersaturated solution to precipitate excess solute. Most solids in solution will dissolve less with increasing temperature. A solution can be saturated at an elevated temperature and subsequently cooled to a lower temperature without precipitating the solute.
Answer:
Most solids in solution exhibit a general trend of increasing solubility with increasing temperature.
A seed crystal may be added to a supersaturated solution to precipitate excess solute.
Explanation:
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions(Lumen Learning).
When a seed crystal is added to a supersaturated solution, excess solute begin to precipitate because the seed crystal now furnishes the required nucleation site where the excess dissolved crystals now begin to grow.
What internal structure do a zebra and a lion share?
Claws
Backbone
Hooves
Hair
Answer:
BACKBONEEEE
Explanation:
Answer:
the answer would be backbone
Explanation:
zebras don't have claws and lions don't have hooves. Finally, hair isn't an internal structure. the correct answer is backbone.
When vinegar and baking soda are combined, a mixture is produced, and
a gas is released. Which statement is true?
Answer:
When vinegar and baking soda are combined a mixture is produced which is carbon dioxide. A gas is released.
Explanation:
What causes the sugar to dissolve in water?
Answer:
Sugar dissolves in water because energy is given off when the slighty polar sucrose molecules form intermoleeular bonds with the polar water molecules.
Explanation:
Answer:
PORS U N DISOLVENTE ELAGA YU E LAZUCR UAE SOLN TOU
Explanation:
What Are the Answers.
Answer:
Yes
Explanation:
it is
A Doppler radar _________. *
1. can detect precipitation as well as the movement of small particles, which can be used to approximate wind speed.
2. is a device that measures wind speed
3.is a computer models used to determine a weather forecast
4. is a package of weather instruments carried many kilometers above the ground by a weather balloon.
how does an object look when it is viewed through an opaque object
For the reaction
3KOH+H3PO4⟶K3PO4+3H2O
how many grams of phosphoric acid, H3PO4, are needed to react completely with 89.7 g of potassium hydroxide, KOH?
Answer:
52.2 g
Explanation:
Step 1: Write the balanced equation
3 KOH + H₃PO₄ ⟶ K₃PO₄ + 3 H₂O
Step 2: Calculate the moles corresponding to 89.7 g of KOH
The molar mass of KOH is 56.11 g/mol.
89.7 g × 1 mol/56.11 g = 1.60 mol
Step 3: Calculate the moles of H₃PO₄ needed to react with 1.60 moles of KOH
The molar ratio of KOH to H₃PO₄ is 3:1. The moles of H₃PO₄ needed are 1/3 × 1.60 mol = 0.533 mol.
Step 4: Calculate the mass corresponding to 0.533 moles of H₃PO₄
The molar mass of H₃PO₄ is 97.99 g/mol.
0.533 mol × 97.99 g/mol = 52.2 g
Which statement is true about a polyatomic ion?
Answer:
The correct answer is that it is made of atoms that are covalently bonded together.
Explanation:
Hope this helped Mark BRAINLEST!!!
I have no clue how to even start this, any help is appreciated!
A sample of 2.54 moles of iron (III) oxide is reacted with 4.56 moles of carbon monoxide to produce iron metal and carbon dioxide. Using the balanced equation below, predict which is the limiting reactant and the maximum amount in moles of carbon dioxide that can be produced.
Fe2O3 + 3CO → 2Fe + 3Co2
A. Iron (III) Oxide, 7.62 moles
B. Carbon monoxide, 5.34 moles
C. Iron (III) oxide, 2.63 moles
D. Carbon monoxide, 4.56 Moles
Answer:
Option D. Carbon monoxide, 4.56 Moles
Explanation:
The balanced equation for the reaction is given below:
Fe₂O₃ + 3CO —> 2Fe + 3CO₂
From the balanced equation above,
1 mole of Fe₂O₃ reacted with 3 moles of CO to produce 3 moles of CO₂.
1. Determination of the limiting reactant.
From the balanced equation above,
1 mole of Fe₂O₃ reacted with 3 moles of CO.
Therefore, 2.54 moles of Fe₂O₃ will react with = 2.54 × 3 = 7.62 moles of CO.
From the calculation made above, we can see that it will take higher amount of CO (i.e 7.62 moles) than what was given (i.e 4.56 moles) to react completely with 2.54 moles of Fe₂O₃. Therefore, CO is the limiting reactant and Fe₂O₃ is the excess reactant.
2. Determination of the maximum amount of carbon dioxide CO₂ produced.
In this case, the limiting reactant will be used since all of it is consumed by reaction.
The limiting reactant is CO and the maximum amount of CO₂ produced can be obtained as follow:
From the balanced equation above,
3 moles of CO reacted to produce 3 moles of CO₂.
Therefore, 4.56 moles of CO will also react to produce 4.56 moles of CO₂.
Thus, the maximum amount of CO₂ produced is 4.56 moles
Summary:
Limiting reactant => carbon monoxide, CO
Maximum amount of carbon dioxide, CO₂ produced = 4.56 moles
Thus, option D gives the correct answer to the question.
Select ALL factors in conservation: *
Social conditions such as need for electricity, famine, and war.
Scientific data related to the ecosystem and the effect of environmental changes.
Political action by governments and other organizations such as environmental
protection groups.
Economic issues such as cost of wood products, fuel for heat, price of electricity, and
income levels of local people.
Answer:
ALL of these are factors in conservation.
Explanation:
Approximately how far will a p-wave travel in 4 minutes?
Answer:
2000 (km)
Explanation:
:)
Determine the ratio of electrostatic potential energies for CsF and Csl.
lon
lonic Radius (pm)
Cst
170
F-
133
1
220
Answer:
The answer is "1.29".
Explanation:
Formula for electrostatic potential energy:
[tex]\to V=\frac{K Q_1 \times Q_2}{r}[/tex]
where
[tex]\to K = \text{electrostatic constant}\\\\\to Q= \text{Charge on Cation}\\\\[/tex]
The Charge on Cation is [tex]C_{s}^{+}[/tex] is cation in both [tex]C_sI[/tex] and [tex]C_sF[/tex] were same:
[tex]\to V\ \alpha \ \frac{1}{r}[/tex]
[tex]\to \frac{V(C_sF)}{V(C_sI)} = \frac{r(C_sI)}{r(C_sF)}[/tex]
[tex]= \frac{r(C_s^{+}) +r(I^{-})}{r(C_s^{+}) +r(F^{-})} \\\\=\frac{170+220}{170+133} \\\\=\frac{390}{303} \\\\ =1.2871 \\\\ =1.29[/tex]
Which change in this process would shift the equilibrium to produce the
maximum possible NH3?
3H2 + N2 2 2NH3 + energy
A. Removing the N2 as it forms
B. Removing the NH3 as it forms
c. Decreasing the pressure
D. Increasing the temperature
Answer: B I think, I'll put my reasoning below.
Explanation:
It's not A because removing N2 would only shift the equation the opposite way.
It's not C and D because I don't think those affect the specific amount of each reactant/product produced. I think temperature only affects the speed at which the reaction is performed, which won't affect anything in this case.
Removing the ammonia as it forms is the correct answer to produce the maximum possible NH₃.
What is Haber's Process ?It is an industrial process for manufacturing ammonia by reaction of nitrogen with hydrogen.
N₂+3H₂ ⇌ 2NH₃
The reaction is reversible and exothermic
To answer this question we will consider all the options and answer
Option D ) Increasing Temperature
Haber's process requires an optimal temperature of 450°C ,on Increasing temperature the yield of ammonia gets slow down.
Option C) Decreasing Pressure
Haber's Process requires high pressure to drive the reaction , higher the pressure more is the yield.
Option A ) Removing the N₂ as it forms , on removing N₂ the reaction will drive on the reverse side hence low yield of NH₃ .
Option B) Removing the NH₃ as it forms , this can actually increase the yield as removing the ammonia will lead to shift the equilibrium and therefore increasing the yield.
Therefore Option B , Removing the ammonia (NH₃) as it forms is the correct answer to produce the maximum possible NH₃.
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Discuss the nature of the bonding in the nitrate ion ( ) NO32 .Draw the possible Lewis resonance diagrams for this ion.Use the VSEPR theory to determine the steric number, thehybridization of the central N atom, and the geometry ofthe ion. Show how the use of resonance structures can beavoided by introducing a de-localized p MO. What bondorder is predicted by the MO model for the NUO bondsin the nitrate ion
Answer:
Four electrons are bounded by eight electrons
and the bond order = 4/3
Explanation:
The molecular ion has 24 valence electrons and The SN of N in the central of the structure is = 3 according to VSEPR Theory. and this depicts trigonal planar geometry about the central nitrogen also this corresponds to sp^2 hybridization of the valence orbital of the atom N.
The 6 valence electrons are shared between N and O's, while the 2p orbital of Nitrogen will combine with the 2p orbital on each oxygen atoms in order to form four (4) π molecular orbitals. the binding orbital is occupied by a pair of electrons. Four electrons are bounded by eight electrons
and the bond order = 4/3
Attached below is the Lewis structure and resonance structures of the ion ( NO^- 3 )
13. Describe the flow of thermal energy.
Plz help
Answer: Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy. ... This energy is usually in the form of low-level thermal energy. Here, low-level means that the temperature associated with the thermal energy is close to that of the environment. hope this helps. Can u pls give me brainliest
Explanation:
what do The representative elements include
Answer:
aajajjajajajajajajajajdsjsjjx jajajjajajajajaisjn
Explanation:
please help due in 1 hour. This is 7th grade science. & in return I’ll help you on something! 15 points
Answer: MCCCMC
Please. Mark as brainliest
When the temperature of matter increases the particles what happens
Answer:
the particles move faster
Explanation:
when the temperature of matter increases the particles move faster as they gain kinetic energy